Ensure triggered when creating Scene Proxy for GroomComponent

UE - Rendering - Architecture - RHI - Apr 30, 2025

When a room component is added in C++ via the actor constructor, an ensure is triggered from precaching and the groom component. Behavior also observed on UE5/Release-5.5, CL: 40988944 ...

Crash Occurs When Using Move Component To and Overlap Event

UE - Gameplay - Jan 29, 2016

When using move component to to move a component, and then calling Destroy Actor when the actor overlaps another actor, a crash occurs. In this case, the user was attempting to move their static m ...

Editor crash when shader debugging enabled including r.shaders.optimize=0

UE - Rendering - Architecture - Shaders - Jun 23, 2024

The editor crashes when activating cvar options for shader compilation and debugging. ...

r.VolumetricRenderTarget.PreferAsyncCompute producing different visuals

UE - Graphics Features - Aug 2, 2024

When the cvar "r.VolumetricRenderTarget.PreferAsyncCompute" is enabled, it will cause Volumetric Clouds to ignore the influence of Volumetric Fog. In high-fog environments, this can cause the clouds ...

Blackboard decorator node does not abort lower-priority nodes

UE - AI - Feb 16, 2026

When a branch of a selector is deactivated, all auxiliary nodes and observer delegates are removed. If the branch is reactivated soon and the CurrentActiveNode remains unchanged, the behavior tree l ...

Cannot Increment a Blackboard Key Value

UE - Gameplay - Blueprint - Feb 4, 2016

Getting a blackboard value as int and then attempting to increment it does not actually increment the value. Upon attempting to increment a value that started at 0, the editor continued to print out ...

Granular Synth crashes project when played in standalone or packaged with assertion failure

UE - Audio - Jan 5, 2021

Assertion failed: SoundWave->GetPrecacheState() == ESoundWavePrecacheState::InProgress The above assertion fail was seen when played in standalone mode. Play-In-Editor mode (PIE) is working as exp ...

Morph target is not applied on the first frame in Level Sequence

UE - CAPT - Control Rig - Dec 4, 2025

When a skeletal mesh with morph targets spawns in the sequence, the morph is not reflected in the first frame.  In the ProcessStage_SkinCache call of SkeletalMesh, MorphVertexBuffer->SectionIds is ...

Crash When Raycasting Against Mesh With Multiple Materials

UE - Simulation - Physics - Feb 26, 2016

When using a raycast trace against a blueprint that has a child component with multiple materials will cause the editor to crash after a few times. This will not be an instant crash, but requires th ...